Cylinder printing-machine.



Patented luly ll, I899.

I c. POTTER. CYLINDER PRINTING MACHINE.

(Application filed Jan. 28, 1897.1

3 Sheets-Sheet I.

(No Model.)

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TH: Npnms PETERS co, moruurap. WASNINGTDN. n c

No. 628,490. Patented m 11, I899.

C. POTTER.

CYLINDER PRINTING MACHINE.

[Application filed Jun. 28,1897.

(No Model) 3 Sheets8heet 2.

m: NORRIS versus co. worauwofl wAsnmnrom u c.

No. 628,490. Patented July n, 1399.

. c. POTTER.

cvuunan PRINTING MACHINE.

(Application filed Jan. 28, 1897.;

3 Sheets-Sheet 3 (No Model.)

Ina enZo r, Cdwan flax a a i UNITED STATES PATENT OFFICE.

CHARLES POTTER, OF PLAINFIELD, NEWV JERSEY, ASSIGNOR TO THE POTTER PRINTING PRESS COMPANY, OF SAME PLACE.

CYLINDER PRINTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 628,490, dated July 1 1, 1899. Application filed January 28, 1897. Serial No. 621,125. (No model.)

To all whom it may concern:

Be it known that I, CHARLES POTTER, a citizen of the United States of America, residing at Plainfield, Union county, State of New Jersey, have invented certain new and useful Improvements in Cylinder Printing-Machines,of which the following is a specification.

The present invention relates generally to bed andcylinder printing-machines,and more particularly to thatclass of such machines wherein the impression-cylinder is raised and lowered with respect to the form-bed. In such cylinder printing-machines it is desirable that some means be provided by which the wearin the cylin der-bearin gs may be compensated for, so that the impression shall at all times be uniform; and to this end the present improvements embrace a novel construction by which the position of the impression-cylinder with respect to the form-bed during the time of the impression is fiXed and accurately determined independent of the cylinderraising and lowering devices and of the form-bed.

The improved means consist of a cylinder raising and lowering device and an abutment forming a stop, 'or having the function'of a stop, mounted on the frame of the machine and against which some portion of the cylinder abuts when the impression-cylinder is in its impression position, such abutment orstop being adjustable in height with respect tothe axis of the cylinder, so that any wear in the parts may be compensated for and the impression position of the cylinder be preserved.

YVith this general understanding of the invention a detailed description thereof will now be given, reference being had to the accompanying drawings, in which- Figure l is a sectional elevation of so much of a cylinder printing-m achine as is necessary to an understanding of the invention, parts being broken away and those shown crowded together for lack of sufficient room to show them in their proper position.

transverse section of the same. Figs. 3 and 4 are modified forms of the abutment or stop.

The impression-cylinder C may be of any usual construction, cooperating with the usual form-bed B. The cylinder is carried by a shaft C, the journal of which is mounted in Fig. 2 is a bearings a, supported by the machine-framework A, the cylinder being driven from any suitable source of power-as, for instance, by power applied to the gear-wheel H, fast to the cylinder-shaft. For registering or other purposes the cylinder may carry a gear a, adapted to mesh with a tooth-rack 1), fast to the side of the form-bed B. The location of the impression-cylinder with respect to the formbed when in impression position is defined by an abutment or stop E, carried by the framework A in position to be borne against by some part of the cylinderC-as, for instance, its hub C In the form of abutment shown in Figs. 1 and 2 it consists of a disk or wheel fixed or loosely rotatable on a stud 6, projecting from a support or carrier 0 and set eccentrically with respect to the axis thereof, so that by rotating the support to a more or less extent the upper surface of the disk or wheel will be raised or lowered, as the case may be. The support is mounted in bearings in the framework A and at its outer end carries an adj listing-plate e having one or more slots 6 with which engage bolts 6, tapped into the framework, by means of which the plate, support, and disk may be firmly secured in any adjusted position.

The raising and lowering device for the cylinder may obviously partake of any suitable form, according to the desires of the maker, without in any manner afiectin g the scope of the presentimprovements. As anillustration of one form ofsuch device the journal of the cylinder-shaft C is surrounded by an eccentric sleeve interposed between said journal and its bearings uand adapted to be rotated more or less in saidbearings to raise and lower the shaft and cylinder. This is eifected automatically by a suitably-shaped cam O, mounted on and rotating with one of the driven shafts G of the machine, which cam is engaged at diametrically opposite points by antifriction-rolls 19, carried by a yoked arm P, that is connected to a lever projecting from a rock-shaft P. This rock-shaft inturn carries another lever q, whose outer end engages the lower endof a rod 8, the upper end of which is connected to an arm extending from the eccentric sleeve 6'. Nhen the up permost antifriction-roll 12 moves from the any desired period of time.

low part of the earn 0, the rod 8 is moved vertically upward to partially rotate the sleeve, and thus raise the impression-cylinder from the plane of impression and from abutting against the abutment or stop E, and when said .antifriction-roll moves from the high part of the cam to its low part the impressioncylinder is lowered against the abutment and into the plane of impression. In practice the eccentric sleeve will be such as to allowthe cylinder to reach the lowest desired position, so that as the parts wear and the abutment E is adjusted to offset such wear and determine the exact impression position of the cylinder there need be no change in the extent of movement imparted by the cam to the connections between it and the eccentric sleeve.

In the raising and lowering device shown there is a slip connection provided between the lever q and the rod 3, so that the cylinder may be left in its raised position for Thus normally the stud g of the lever q rests in an offset at the upper end of a curved slot 8, such position being maintained by a spring an, interposed between the rod and aprojection from the lever q. When the connection between the lever and rod is desired, the pressman by any suitable means simply rocks an arm 1; over against the rod and moves it to the left against the force of the spring, so that the slot is brought into alinement with the stud (1 whereupon the lever may make any number of idle movements with its stud playing loosely in said slot, leaving the cylinder in its raised position. be rocked in the reverse directions the spring a; restores the rod to its normal position, so that the stud will again engage with the ottset of the slotted end of the rod. 1

It should be understood that no claim is.

herein made to the cylinder raising and lowering device shown and described, as such device forms the subject of an application filed by me on or about April 11, 1896, Serial No. 587,117.

It is obvious that other forms of the abutment or stop E may be adopted without materially affecting the scope of this invention. Thus in the modified form shown in Fig. 3 the abutment is provided with a curved seat 6 in which the cylinder-shaft or the cylinder-hub C may rest when the cylinder is in its down or impression position. Such an abutment is carried loosely on the inner end of a stud, as in Fig. 1, set eccentric to the rotatably-ad- By causing the arm to j ustable carrier of said figure, the abutment being prevented from turning and becoming displaced by its upper ends meeting the cylinder-hub, the cylinder never being raised sufficiently for said ends to escape meeting the hub.

In the modification shown in B 1g. t the abutment E is in the form of an eccentric e, fixed to the inner end of the rotatably-adjustable carrier 6' and adjusted bodily with the carrier when it is moved for that purpose.

. When only one abutment E at one side of the impression-cylinder has been specifically referred to, it will be understood that it will be duplicated upon the other side, so that the position of the cylinder with respect to the form-bed may be accurately fixed at both of its ends.

What I claim is- 1. The combination with an impression-cylinder, its coacting form-bed and thecylinder raising and lowering device, of an abutment independent of the cylinder and its bed in position upon the final movement of thelowering device to bring and hold the top portion of the cylinder-bearings firmly. against the upper portions of the journals during the impression movements, as described.

2. The combination with animpression'cylinder, its coacting form-bed, and the cylinder lowering and raising device, of an abutment mounted independent of the cylinder and its bed in position upon the final movement of the lowering device to bring and hold the top portion of the cylinder-bearin gs firmly against the upper portions of the journals during the impression movements and means for adj usting the position of the abutment, as set forth.

3. The combination with an impression-cylinder, its coacting form-bed and the cylinder raising and lowering device, of an abutment consisting of a support or carrier rotatably mounted in theframework at each end of the cylinder and carrying a disk or the like against which the adjacent portion of the cylinder may rest when in its impression position and adapted to determine the position of the cylinder upon the return of the said raising and lowering devices, as set forth.

In witness whereof I have-hereunto set my hand in the presence of two witnesses.

1 CHARLES POTTER.

Witnesses: Y

J. C. POPE, H. B. MCDONALD. 

